EP 3037566 A4 20170419 - STEEL FOR MECHANICAL STRUCTURES WHICH HAS EXCELLENT MACHINABILITY
Title (en)
STEEL FOR MECHANICAL STRUCTURES WHICH HAS EXCELLENT MACHINABILITY
Title (de)
STAHL FÜR MECHANISCHE STRUKTUREN MIT HERVORRAGENDER VERARBEITBARKEIT
Title (fr)
ACIER POUR STRUCTURES MÉCANIQUES QUI PRÉSENTE UNE EXCELLENTE MACHINABILITÉ
Publication
Application
Priority
- JP 2013172546 A 20130822
- JP 2014071081 W 20140808
Abstract (en)
[origin: EP3037566A1] A steel for mechanical structures has a mixed texture which is composed of a hard phase comprising at least one texture selected from pearlite, bainite and martensite and a ferrite phase, wherein the average equivalent circle diameter of ferrite grains is 7 µm or less and the (ferrite grain) - (ferrite grain) connection rate (X) which is expressed by formula (1) is 0.15 or less. (1): [(Ferrite grain) - (ferrite grain) connection rate (X)] = [the number (A) of (ferrite grain) - (ferrite grain) boundary surfaces] / [the number (B) of (ferrite grain) - (hard phase) boundary surfaces]
IPC 8 full level
C22C 38/00 (2006.01); B21D 37/01 (2006.01); B21J 13/02 (2006.01); C21D 6/00 (2006.01); C21D 8/02 (2006.01); C22C 38/02 (2006.01); C22C 38/04 (2006.01); C22C 38/42 (2006.01); C22C 38/44 (2006.01); C22C 38/58 (2006.01)
CPC (source: EP US)
B21D 37/01 (2013.01 - US); B21J 13/02 (2013.01 - US); C21D 8/005 (2013.01 - EP US); C21D 8/02 (2013.01 - EP US); C21D 8/0205 (2013.01 - EP US); C21D 8/0226 (2013.01 - EP US); C21D 8/0263 (2013.01 - EP US); C22C 38/00 (2013.01 - US); C22C 38/002 (2013.01 - EP US); C22C 38/02 (2013.01 - EP US); C22C 38/04 (2013.01 - EP US); C22C 38/08 (2013.01 - EP US); C22C 38/12 (2013.01 - EP US); C22C 38/16 (2013.01 - EP US); C22C 38/18 (2013.01 - EP US); C22C 38/42 (2013.01 - US); C22C 38/44 (2013.01 - US); C22C 38/58 (2013.01 - EP US); C21D 2211/002 (2013.01 - EP US); C21D 2211/005 (2013.01 - EP US); C21D 2211/008 (2013.01 - EP US); C21D 2211/009 (2013.01 - EP US); C21D 2261/00 (2013.01 - EP US)
Citation (search report)
- [A] JP 2000345284 A 20001212 - NIPPON STEEL CORP
- [A] JP 2000212686 A 20000802 - KAWASAKI STEEL CO
- [A] KR 20080057845 A 20080625 - POSCO [KR]
- [A] KR 20080060621 A 20080702 - POSCO [KR]
- [A] US 2005058567 A1 20050317 - IWAMA NAOKI [JP], et al
- [A] JP H1192860 A 19990406 - NAT RES INST METALS, et al
- [A] JP 2000239791 A 20000905 - KAWASAKI STEEL CO
- See references of WO 2015025746A1
Designated contracting state (EPC)
AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR
DOCDB simple family (publication)
EP 3037566 A1 20160629; EP 3037566 A4 20170419; CN 105473750 A 20160406; JP 2015040335 A 20150302; KR 20160030577 A 20160318; US 2016194741 A1 20160707; WO 2015025746 A1 20150226
DOCDB simple family (application)
EP 14838708 A 20140808; CN 201480045836 A 20140808; JP 2013172546 A 20130822; JP 2014071081 W 20140808; KR 20167004165 A 20140808; US 201414910888 A 20140808